EP0963674A2 - Public mobile communication system compatible wireless communication system - Google Patents

Public mobile communication system compatible wireless communication system

Info

Publication number
EP0963674A2
EP0963674A2 EP98913526A EP98913526A EP0963674A2 EP 0963674 A2 EP0963674 A2 EP 0963674A2 EP 98913526 A EP98913526 A EP 98913526A EP 98913526 A EP98913526 A EP 98913526A EP 0963674 A2 EP0963674 A2 EP 0963674A2
Authority
EP
European Patent Office
Prior art keywords
base station
communication system
mobile communication
cordless communication
cordless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98913526A
Other languages
German (de)
French (fr)
Other versions
EP0963674B1 (en
Inventor
Frieder Pernice
Patrik Ljungström
Walter Mohrs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telekom Deutschland GmbH
Original Assignee
Deutsche Telekom AG
DeTeMobil Deutsche Telekom Mobilnet GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Telekom AG, DeTeMobil Deutsche Telekom Mobilnet GmbH filed Critical Deutsche Telekom AG
Publication of EP0963674A2 publication Critical patent/EP0963674A2/en
Application granted granted Critical
Publication of EP0963674B1 publication Critical patent/EP0963674B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the invention relates to a cordless communication system compatible with a public mobile communication system according to the preamble of patent claim 1.
  • Device systems led which are either suitable for mobile radio operation or cordless operation.
  • terminals in particular mobile terminals, which are suitable for operation in two different mobile communication systems.
  • Another starting point is to set up the base station of a cordless communication system in such a way that it is compatible with a public mobile communication system, ie can communicate with conventional mobile terminals of the public mobile communication system.
  • a cordless communication system ie can communicate with conventional mobile terminals of the public mobile communication system.
  • One problem here is that the base station of the cordless communication system is connected to a fixed landline network, so that it is not possible to influence the base station directly via the mobile communication system.
  • the object of the invention is therefore to propose a cordless communication system with security functions, which is compatible with a public mobile communication system and allows the use of associated mobile terminals.
  • cordless communication system should, despite its property as a private system, be able to be set up and operated under the control of the respective mobile communication network operator.
  • the invention is characterized by the features of claim 1.
  • the essence of the invention is to equip the base station of the cordless communication system with a suitable reader / writer with which information from conventional identification modules, including chip cards, SIM's (Subsciber Identity Modules), generally all active information-storing and information-processing data carriers, is read and can be described.
  • identification modules including chip cards, SIM's (Subsciber Identity Modules), generally all active information-storing and information-processing data carriers, is read and can be described.
  • the base station of the cordless communication system is now able to perform the functions of a base station of the mobile communication network with authentication functionality, more precisely, the functions of a home location register (HLR: Home Location Register) or one Authorization center (AUC: Authentication Center) take.
  • HLR Home Location Register
  • AUC Authorization center
  • base station refers to the base station of the cordless communication system, unless stated otherwise.
  • GSM cordless operation security features, such as authentication and encryption of the call data, such as are offered when operating in the GSM mobile radio network. It is important that the chip card required to operate the base station is issued solely by the network operator, as is also the case with GSM -Mobile devices is common.
  • the chip card used in the base station together with suitable software implemented in the base station, takes over the functions of the home register
  • HLR head-to-live
  • AUC authorization center
  • HLR the mobile terminal now authenticates itself to the base station of the cordless system and not, as usual, to the mobile radio network.
  • a random number is generated on the basis of the software implemented in the base station, which is identical to that in both chip cards, the chip card the base station and the chip card of the mobile terminal, identically stored Ki keys and the GSM system-specific A3 algorithm are each converted into an SRES response (authentication result). If the two authentication results match - the base station and the mobile terminal - the authentication is successful. This authentication procedure is similar to that of the GSM system.
  • the key K c which is used to encrypt the communication on the radio interface in cordless mode (as in the GSM system), is derived in a known manner using the Ki key and the A8 algorithm.
  • additional data such as e.g. the permitted frequencies, the maximum permitted output powers for the base station and the mobile terminal, the permitted services (telephony,
  • Initialization parameters that the network operator wants to influence and which the base station may use cannot be manipulated. This corresponds, at least for the services, to the known authorization management in the home location register (HLR) of a GSM mobile radio network.
  • HLR home location register
  • each subscriber who wants to use the base station has his own second SIM card, which can be inserted into the base station.
  • the base station requires several card readers for this.
  • Another possibility is that data and keys for several participants are stored on the SIM card of the base station.
  • the chip card used in the base station contains identical information in the core area as the chip card of the GSM mobile terminal that is to be operated with the base station.
  • a mobile terminal can only authenticate and log on to the base station if the personal user data, in particular the security functions on both cards, match.
  • the authorization to communicate with the base station is deleted in the SIM card of the mobile terminal, preferably via the GSM radio interface. This means that the base station can continue to operate on a specific basis
  • Network operators can no longer sensibly enable frequencies, since the mobile terminal can no longer authenticate with the base station.
  • Base station contains a timer which is programmed by the network operator for a specific time and which is automatically reset whenever the base station is used by the subscriber. When the base station is not in use, e.g. after termination of the
  • the base station loses the authorization to operate the transmitter on the frequencies of the mobile communication system after the programmed period of time. If the base station is not used for a long time, the timer function can be frozen by switching off the base station. If, for example, the participant forgot to switch off the base station before starting a long vacation and has deactivated it automatically, the possibility of an emergency resumption is provided within a defined time window.
  • GSM-compatible base station To implement a GSM-compatible base station, it must first be equipped with a card reader for GSM SIM cards. Furthermore, the base station must be able to send and receive on standard GSM frequencies. The functions of the base station are controlled using suitable software, such as is used in the GSM terminals, and which carries out and controls the usual GSM authentication and other functions.
  • the mobile terminal itself requires only a few software modifications.
  • FIG. 1 schematically shows an exemplary physical constellation of the system according to the invention
  • FIG. 2 schematically shows an exemplary logical constellation of the system according to the invention.
  • FIG. 1 Some devices of a public mobile communication system are shown schematically in FIG.
  • a mobile terminal 3 which is located in the coverage area of a base station 4 of the mobile communication system and can communicate with it in encrypted form via the radio interface.
  • Base station 4 of the mobile communication system is connected to an exchange 5 which has access to a public fixed network 9.
  • the exchange 5 is also in contact with the home location register (HLR) and the authorization center (AUC) of the mobile radio network.
  • HLR home location register
  • AUC authorization center
  • the mobile terminal 3 wants to be in the mobile communication network log in, an authentication of the mobile terminal 3 is carried out in a known manner within the home register or the authorization center 6.
  • a base station 1 (HBS) of a cordless communication system which is also connected to a public fixed line network 2 (PSTN, ISDN), is shown. Due to the low output power, the coverage area of the base station is relatively small. As a rule, the base station 1 is located within the
  • Coverage area of one or more base stations 4 of a public mobile communication network is not limited.
  • the mobile terminal 3 authenticates itself in the mobile radio operation via the mobile radio network, with the help of a specific one
  • Identification key on the one hand in the SIM card 8 of the mobile terminal 3 and on the other hand in the home register 6 (HLR). the authorization center (AUC) of the mobile communication system.
  • the base station 1 of the cordless communication system is now equipped with an identification module 7 (for example also with a SIM card) and suitable software in order to be able to use the on the
  • Identification module 7 stored data now perform the same functions and tasks that the home register or the authorization center of the mobile communication system perform, so that the mobile terminal 3, provided that it is located in the coverage area of the cordless communication system and has access authorization, is at its associated base station 1 the cordless system can authenticate, log in and communicate in encrypted form. This is only possible if essential areas of the data of the identification module 7 used in the base station 1 are identical to the data stored on the chip card (SIM) of the access-authorized mobile terminal 3.
  • SIM chip card
  • the base station 1 of the cordless system is now compatible with the mobile communication system, i.e. in the standby mode, the base station 1 of the cordless system periodically sends out a specific identifier to indicate its presence and readiness for operation.
  • the mobile terminal 3 listens to the frequency band according to the specific identifier of the base station 1. If the mobile terminal 3 comes into the coverage area of the base station 1 and receives its identification without interference, the mobile terminal 3 will try to log into the base station 1 in the manner described. For this purpose, as with the GSM system, authentication and initialization messages are exchanged between base station 1 and mobile terminal 3. If the authentication was successful, the mobile terminal 3 can communicate via the fixed network 2, without going through the mobile communication network.
  • Base station 1 of the cordless communication network communicates with one another in encrypted form.

Abstract

The invention relates to a wireless communication system which, at a radio interface, is substantially compatible with a public mobile communication system provided with at least one authentication function whereby the base station of the wireless communication system is fitted with devices for reading and writing information from/on identification modules and is equipped with suitable software so that home location register (HLR) functions or authentication centres(AUC) can be provided along with the data filed on the identification module. Complete non-manipulative initialization parameters of the wireless base stations that the network operator wishes to keep under control are also filed onto the identification system module.

Description

Zu einem öffentlichen Mobilkommunikationssystem kompatibles Schnurlos-Kommunikationssystem Cordless communication system compatible with a public mobile communication system
Die Erfindung betrifft ein zu einem öffentlichen Mobilkommunikationssystem kompatibles Schnurlos- Kommunikationssystem nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a cordless communication system compatible with a public mobile communication system according to the preamble of patent claim 1.
Bei den heutigen mobilen Kommunikationssystemen gibt es eine klare Unterscheidung zwischen Öffentlichen Mobilfunksystemen, wie z.B. dem GSM-System, und privaten Schnurlos- Kommunikationssystemen, die z.B. nach dem digitalen DECT- Standard arbeiten. Dies hat zu unterschiedlichenWith today's mobile communication systems there is a clear distinction between public mobile radio systems, e.g. the GSM system, and private cordless communication systems, e.g. work according to the digital DECT standard. This has different
Gerätesystemen geführt, welche entweder für den Mobilfunkbetrieb oder den Schnurlos-Betrieb geeignet sind.Device systems led, which are either suitable for mobile radio operation or cordless operation.
Es wurden schon Versuche unternommen, Endgeräte, insbesondere Mobilendgeräte, zu konstruieren, welche zum Betrieb in zwei verschiedenen Mobilkommunikationssystemen geeignet sind. Aufgrund der Inkompatibilität der verschiedenen Standards führt dies jedoch zu relativ benutzerunfreundlichen und teueren Lösungen.Attempts have already been made to construct terminals, in particular mobile terminals, which are suitable for operation in two different mobile communication systems. However, due to the incompatibility of the different standards, this leads to relatively user-unfriendly and expensive solutions.
Ein anderer Ansatzpunkt liegt darin, die Basisstation eines Schnurlos-Kommunikationssystem derart einzurichten, daß diese zu einem öffentlichen Mobilkommunikationssystem kompatibel ist, d.h. mit herkömmlichen Mobilendgeräten des öffentlichen Mobilkommunikationssystems kommunizieren kann. Es fehlt jedoch an geeigneten Lösungsvorschlägen zur Realisation, z.B. der erforderlichen Sicherheitsfunktionen. Ein Problem liegt dabei darin, daß die Basisstation des Schnurlos- Kommunikationssystem mit einem leitungsgebundenen Festnetz verbunden ist, so daß eine direkte Beeinflussung der Basisstation über das Mobilkommunikationssystem nicht möglich ist .Another starting point is to set up the base station of a cordless communication system in such a way that it is compatible with a public mobile communication system, ie can communicate with conventional mobile terminals of the public mobile communication system. However, there are no suitable proposals for implementation, eg the required safety functions. One problem here is that the base station of the cordless communication system is connected to a fixed landline network, so that it is not possible to influence the base station directly via the mobile communication system.
Aufgabe der Erfindung ist es daher, ein Schnurlos- KommunikationsSystem mit Sicherheitsfunktionen vorzuschlagen, welches mit einem öffentlichen Mobilkommunikationssystem kompatibel ist und die Benutzung zugehöriger Mobilendgeräte erlaubt .The object of the invention is therefore to propose a cordless communication system with security functions, which is compatible with a public mobile communication system and allows the use of associated mobile terminals.
Eine weitere Aufgabe besteht darin, daß das Schnurlos- Kommunikationssystem trotz seiner Eigenschaft als privates System die Möglichkeit aufweisen soll, unter Kontrolle des jeweiligen Mobilkommunikations-Netzbetreibers eingerichtet und betrieben zu werden.Another object is that the cordless communication system should, despite its property as a private system, be able to be set up and operated under the control of the respective mobile communication network operator.
Zur Lösung der gestellten Aufgabe ist die Erfindung durch die Merkmale des Anspruchs 1 gekennzeichnet.To achieve the object, the invention is characterized by the features of claim 1.
Das Wesen der Erfindung besteht darin, die Basisstation des Schnurlos-KommunikationsSystems mit einem geeigneten Lese- /Schreibgerät auszustatten, mit welchem Informationen herkömmlicher Identifikationsmodule, darunter werden verstanden z.B. Chipkarten, SIM's (Subsciber Identity Modules) , allgmein alle aktiven informationsspeichernden und informationsverarbeitenden Datenträger, gelesen und beschrieben werden können. In Verbindung mit einer geeigneten Software und den auf dem Identifikationsmodul abgelegten Daten ist die Basisstation des Schnurlos- Kommunikationssystems nun in der Lage, die Funktionen einer Basisstation des Mobilkommunikationsnetzes mit Authentifiktionsfunktionalität , genauer, die Funktionen eines Heimatregisters (HLR: Home Location Register) bzw. einer Berechtigungszentrale (AUC: Authentication Center) zu übernehmen. Damit kann sich jedes zur Benutzung befugte Mobilendgerät bei der Basisstation des Schnurlos- Kommunikationssystems einbuchen und über das Festnetz kommunizieren .The essence of the invention is to equip the base station of the cordless communication system with a suitable reader / writer with which information from conventional identification modules, including chip cards, SIM's (Subsciber Identity Modules), generally all active information-storing and information-processing data carriers, is read and can be described. In conjunction with suitable software and the data stored on the identification module, the base station of the cordless communication system is now able to perform the functions of a base station of the mobile communication network with authentication functionality, more precisely, the functions of a home location register (HLR: Home Location Register) or one Authorization center (AUC: Authentication Center) take. This means that any mobile terminal authorized to use can log into the base station of the cordless communication system and communicate via the fixed network.
Im folgenden bezieht sich der Begriff „Basisstation", sofern nicht anders angegeben, auf die Basisstation des Schnurlos- Kommunikationssystems .In the following, the term “base station” refers to the base station of the cordless communication system, unless stated otherwise.
Im folgenden wird eine von vielen Möglichkeiten des Erfindungsgedankens am Beispiel eines GSM- Mobilkommunikationssystems beschrieben. Die Erfindung ist jedoch nicht auf das GSM-Mobilkommunikationssystem beschränkt .One of many possibilities of the inventive concept is described below using the example of a GSM mobile communication system. However, the invention is not limited to the GSM mobile communication system.
Mit der Implementierung eines oder mehrerer Chipkartenleser/- Schreiber und einer üblichen SIM-Chipkarte in der Basisstation des Schnurlos-KommunikationsSystems wird erreicht, daß der Betrieb der Basisstation unter Kontrolle des jeweiligen GSM-Netzbetreibers arbeitet und daß demWith the implementation of one or more chip card readers / writers and a conventional SIM chip card in the base station of the cordless communication system it is achieved that the operation of the base station works under the control of the respective GSM network operator and that
Teilnehmer im „GSM-Schnurlosbetrieb" Sicherheitsmerkmale, wie z.B. Authentikation und Verschlüsselung der Gesprächsdaten, wie beim Betrieb im GSM-Mobilfunknetz geboten werden. Wichtig ist, daß die zum Betrieb der Basisstation benötigte Chipkarte allein durch den Netzbetreiber ausgegeben wird, wie es auch bei GSM-Mobilendgeräten üblich ist.Participants in "GSM cordless operation" security features, such as authentication and encryption of the call data, such as are offered when operating in the GSM mobile radio network. It is important that the chip card required to operate the base station is issued solely by the network operator, as is also the case with GSM -Mobile devices is common.
Die in der Basisstation verwendete Chipkarte übernimmt hierbei zusammen mit einer geeigneten, in der Basisstation implementierten Software die Funktionen des HeimatregistersThe chip card used in the base station, together with suitable software implemented in the base station, takes over the functions of the home register
(HLR) bzw. der Berechtigungszentrale (AUC) , das heisst, das Mobilendgerät authentisiert sich nun gegenüber der Basisstation des SchnurlosSystems, und nicht, wie gewohnt gegenüber dem Mobilfunknetz . Dabei wird anhand der implementierten Software in der Basisstation eine Zufallszahl generiert, die mit dem in beiden Chipkarten, der Chipkarte der Basisstation und der Chipkarte des Mobilendgeräts, identisch abgelegten Ki-Schlüssel und dem GSM- systemspezifischen A3 -Algorithmus zu je einer SRES-Antwort (Authentisierungsergebnis) umgeformt wird. Bei Übereinstimmung der beiden Authentisierungsergebnisse - der Basisstation und des Mobilendgeräts - ist die Authentifikation erfolgreich. Diese Authentisierungsprozedur gleicht der des GSM-Systems.(HLR) or the authorization center (AUC), that is, the mobile terminal now authenticates itself to the base station of the cordless system and not, as usual, to the mobile radio network. A random number is generated on the basis of the software implemented in the base station, which is identical to that in both chip cards, the chip card the base station and the chip card of the mobile terminal, identically stored Ki keys and the GSM system-specific A3 algorithm are each converted into an SRES response (authentication result). If the two authentication results match - the base station and the mobile terminal - the authentication is successful. This authentication procedure is similar to that of the GSM system.
Aus der gleichen Zufallszahl wird mit dem Ki-Schlüssel und dem A8 -Algorithmus in bekannter Weise der Schlüssel Kc hergeleitet, der zur Verschlüsselung der Kommunikation auf der Funkschnittstelle im Schnurlosbetrieb dient (wie beim GSM-System) .From the same random number, the key K c , which is used to encrypt the communication on the radio interface in cordless mode (as in the GSM system), is derived in a known manner using the Ki key and the A8 algorithm.
Neben den üblichen personenspezifischen Daten können auf dem SIM der Basisstation noch zusätzliche Daten, wie z.B. die erlaubten Frequenzen, die maximal zulässigen Ausgangsleistungen für die Basisstation und das Mobilendgerät, die zulässigen Dienste (Telefonie,In addition to the usual person-specific data, additional data such as e.g. the permitted frequencies, the maximum permitted output powers for the base station and the mobile terminal, the permitted services (telephony,
Datenübertragung, Fax etc.) und alle anderenData transmission, fax etc.) and all others
Initialisierungsparameter, auf die der Netzbetreiber Einfluss nehmen will und welche die Basisstation benutzen darf, nicht manipulierbar abgelegt werden. Dies entspricht, zumindest für die Dienste, der bekannten Berechtigungsverwaltung im Heimatregister (HLR) eines GSM-Mobilfunknetzes.Initialization parameters that the network operator wants to influence and which the base station may use cannot be manipulated. This corresponds, at least for the services, to the known authorization management in the home location register (HLR) of a GSM mobile radio network.
Durch geeignetes Schlüsselmanagement kann erreicht werden, daß mehrere Teilnehmer, z.B. Familienangehörige, über ein und dieselbe Basisstation kommunizieren können. Dazu ist als erste Möglichkeit vorgesehen, daß jeder Teilnehmer, der die Basisstation benutzen will, seine eigene zweite SIM-Karte besitzt, die in die Basisstation eingesteckt werden kann. Die Basisstation benötigt hierfür mehrere Kartenlesegeräte. Eine andere Möglichkeit besteht darin, daß auf der SIM-Karte der Basisstation Daten und Schlüssel für mehrere Teilnehmer gespeichert sind.With suitable key management it can be achieved that several participants, for example family members, can communicate via one and the same base station. For this purpose, the first possibility is provided that each subscriber who wants to use the base station has his own second SIM card, which can be inserted into the base station. The base station requires several card readers for this. Another possibility is that data and keys for several participants are stored on the SIM card of the base station.
Des weiteren ist ein Gruppenschlüssel in der Basisstation denkbar, der die Authentikation mehrerer individueller Teilnehmer erlaubt .Furthermore, a group key is conceivable in the base station, which allows the authentication of several individual subscribers.
Wichtig ist, daß die in der Basisstation verwendete Chipkarte im Kernbereich identische Informationen enthält, wie die Chipkarte de GSM-Mobilendgerätes, die mit der Basisstation betrieben werden soll. Nur wenn die persönlichen Benutzerdaten, insbesondere die Sicherheitsfunktionen auf beiden Karten übereinstimmen, kann sich ein Mobilendgerät bei der Basisstation authentisieren und einbuchen.It is important that the chip card used in the base station contains identical information in the core area as the chip card of the GSM mobile terminal that is to be operated with the base station. A mobile terminal can only authenticate and log on to the base station if the personal user data, in particular the security functions on both cards, match.
Bei Kündigung des regulären GSM-Teilnehmerverhältnisses wird in der SIM-Karte des Mobilendgerätes, vorzugsweise über die GSM-Funkschnittstelle, die Berechtigung zum Kommunizieren mit der Basisstation gelöscht. Damit ist ein weiterer Betrieb der Basisstation auf den jeweiligen vom spezifischenIf the regular GSM subscriber relationship is terminated, the authorization to communicate with the base station is deleted in the SIM card of the mobile terminal, preferably via the GSM radio interface. This means that the base station can continue to operate on a specific basis
Netzbetreiber freigeschalteten Frequenzen nicht mehr sinnvoll möglich, da sich das Mobilendgerät nicht mehr bei der Basisstation authentisieren kann.Network operators can no longer sensibly enable frequencies, since the mobile terminal can no longer authenticate with the base station.
Eine mögliche Ausführungsform sieht zudem vor, daß dieA possible embodiment also provides that the
Basisstation einen Zeitgeber (Timer) beinhaltet, der vom Netzbetreiber auf eine bestimmte Zeit programmiert ist, und bei Benutzung der Basisstation durch den Teilnehmer immer wieder automatisch zurückgesetzt wird. Bei Nichtbenutzung der Basisstation, z.B. nach Kündigung desBase station contains a timer which is programmed by the network operator for a specific time and which is automatically reset whenever the base station is used by the subscriber. When the base station is not in use, e.g. after termination of the
Teilnehmerverhältnisses, verliert die Basisstation nach Ablauf der programmierten Zeitspanne die Berechtigung, den Sender auf den Frequenzen des MobilkommunikationsSystems in Betrieb zu nehmen. Wird die Basisstation für längere Zeit nicht benutzt, kann die Funktion des Timers durch abschalten der Basisstation eingefroren werden. Hat der Teilnehmer z.B. vor Antritt eines langen Urlaubs, vergessen, die Basisstation abzuschalten und hat sich diese automatisch deaktiviert, so ist innerhalb eines definierten Zeitfensters die Möglichkeit einer Notwiederaufnahme vorgesehen.Subscriber ratio, the base station loses the authorization to operate the transmitter on the frequencies of the mobile communication system after the programmed period of time. If the base station is not used for a long time, the timer function can be frozen by switching off the base station. If, for example, the participant forgot to switch off the base station before starting a long vacation and has deactivated it automatically, the possibility of an emergency resumption is provided within a defined time window.
Zur Realisierung einer GSM-kompatiblen Basisstation ist diese zunächst mit einem Kartenleser für GSM-SIM-Karten auszustatten. Weiterhin muß die Basisstation dazu in der Lage sein auf GSM-Standardfrequenzen zu senden und zu empfangen. Die Steuerung der Funktionen der Basisstation erfolgt über eine geeignete Software, wie sie z.B. in den GSM-Endgeräten benutzt wird, und welche die GSM-übliche Authentifikation und weiteren Funktionen durchführt und steuert .To implement a GSM-compatible base station, it must first be equipped with a card reader for GSM SIM cards. Furthermore, the base station must be able to send and receive on standard GSM frequencies. The functions of the base station are controlled using suitable software, such as is used in the GSM terminals, and which carries out and controls the usual GSM authentication and other functions.
Das Mobilendgerät selbst bedarf nur geringer softwaretechnischer Modifikation .The mobile terminal itself requires only a few software modifications.
Figur 1 zeigt schematisch eine beispielhafte physikalische Konstellation des erfindungsgemäßen Systems;FIG. 1 schematically shows an exemplary physical constellation of the system according to the invention;
Figur 2 zeigt schematisch eine beispielhafte logische Konstellation des erfindungsgemäßen Systems.FIG. 2 schematically shows an exemplary logical constellation of the system according to the invention.
In Figur 1 sind schematisch einige Einrichtungen eines öffentlichen Mobilkommunikationssystems dargestellt. Es ist ein Mobilendgerät 3 vorhanden, welches sich im Versorgungsbereich einer Basisstation 4 des Mobilkommunikationssystems befindet und mit dieser über die Funkschnittstelle verschlüsselt kommunizieren kann. DieSome devices of a public mobile communication system are shown schematically in FIG. There is a mobile terminal 3, which is located in the coverage area of a base station 4 of the mobile communication system and can communicate with it in encrypted form via the radio interface. The
Basisstation 4 des Mobilkommunikationssystems ist mit einer Vermittlungsstelle 5 verbunden, die Zugang zu einem öffentlichen Festnetz 9 hat. Weiterhin steht die Vermittlungsstelle 5 mit dem Heimatregister (HLR) und der Berechtigungszentrale (AUC) des Mobilfunknetzes in Kontakt. Will sich das Mobilendgerät 3 im Mobilkommunikationsnetz einbuchen, so wird in bekannter Weise innerhalb des Heimatregisters bzw. der Berechtigungszentrale 6 eine Authentifikation des Mobilendgerätes 3 durchgeführt.Base station 4 of the mobile communication system is connected to an exchange 5 which has access to a public fixed network 9. The exchange 5 is also in contact with the home location register (HLR) and the authorization center (AUC) of the mobile radio network. The mobile terminal 3 wants to be in the mobile communication network log in, an authentication of the mobile terminal 3 is carried out in a known manner within the home register or the authorization center 6.
Des weiteren ist eine ebenfalls mit einem öffentlichen leitungsgebundenen Festnetz 2 (PSTN, ISDN) verbundene Basisstation 1 (HBS) eines Schnurlos-Kommunikationssystems dargestellt. Aufgrund der geringen Ausgangsleistung ist der Versorgungsbereich der Basisstation relativ klein. In der Regel befindet sich die Basisstation 1 innerhalb desFurthermore, a base station 1 (HBS) of a cordless communication system, which is also connected to a public fixed line network 2 (PSTN, ISDN), is shown. Due to the low output power, the coverage area of the base station is relatively small. As a rule, the base station 1 is located within the
Versorgungsbereiches einer oder mehrerer Basisstationen 4 eines öffentlichen Mobilkommunikationsnetzes .Coverage area of one or more base stations 4 of a public mobile communication network.
Wie in Figur 2 dargestellt ist, authentisiert sich das Mobilendgerät 3 im Mobilfunkbetrieb über das Mobilfunknetz, und zwar mit Hilfe eines spezifischenAs shown in FIG. 2, the mobile terminal 3 authenticates itself in the mobile radio operation via the mobile radio network, with the help of a specific one
Identifikationsschlüssels (Ki-Schlüssel) der einerseits in der SIM-Karte 8 des Mobilendgerätes 3 und andererseits im Heimatregister 6 (HLR) bez . der Berechtigungszentrale (AUC) des Mobilkommunikationssystems abgelegt ist.Identification key (Ki key) on the one hand in the SIM card 8 of the mobile terminal 3 and on the other hand in the home register 6 (HLR). the authorization center (AUC) of the mobile communication system.
Erfindungsgemäß ist nun die Basisstation 1 des Schnurlos- Kommunikationssystems mit einem Identifikationsmodul 7 (z.B. ebenfalls mit einer SIM-Karte) und einer geeigneten Software ausgestattet, um in Verbindung mit den auf demAccording to the invention, the base station 1 of the cordless communication system is now equipped with an identification module 7 (for example also with a SIM card) and suitable software in order to be able to use the on the
Identifikationsmodul 7 abgelegten Daten nun dieselben Funktionen und Aufgaben wahrzunehmen, die das Heimatregister bzw. die Berechtigungszentrale des Mobilkommunikationssystems wahrnehmen, so daß das Mobilendgerät 3, sofern es sich im Versorgungsgebiet des Schnurlos-Kommunikationssystems befinden und eine Zugangsberechtigung hat, sich bei der ihr zugehörigen Basisstation 1 des Schnurlossystems authentisieren, einbuchen und verschlüsselt kommunizieren kann. Das ist nur möglich, wenn wesentliche Bereiche der Daten des in der Basisstation 1 benutzten Identifikationsmoduls 7 identisch mit den auf der Chipkarte (SIM) des zugangsberechtigten Mobilendgerätes 3 abgelegten Daten ist.Identification module 7 stored data now perform the same functions and tasks that the home register or the authorization center of the mobile communication system perform, so that the mobile terminal 3, provided that it is located in the coverage area of the cordless communication system and has access authorization, is at its associated base station 1 the cordless system can authenticate, log in and communicate in encrypted form. This is only possible if essential areas of the data of the identification module 7 used in the base station 1 are identical to the data stored on the chip card (SIM) of the access-authorized mobile terminal 3.
Erfindunggemäß ist die Basisstation 1 des Schnurlossystems nun kompatibel zum Mobilkommunikationssystem, d.h. im Standby-Modus sendet die Basisstation 1 des Schnurlossystems periodisch eine spezifische Kennung aus, um seine Anwesenheit und Betriebsbereitschaft anzuzeigen. Das Mobilendgerät 3 hört das Frequenzband nach der spezifischen Kennung der Basisstation 1 ab. Wenn das Mobilendgerät 3 in den Versorgungsbereich der Basisstation 1 kommt, und deren Kennung störungsfrei empfängt, wird das Mobilendgerät 3 versuchen sich in beschriebener Weise bei der Basisstation 1 einzubuchen. Dazu werden, wie beim GSM-System, Authentisierungs- und Initialisierungsnachrichten zwischen Basisstation 1 und Mobilendgerät 3 ausgetauscht. War die Authentisierung erfolgreich kann das Mobilendgerät 3 über das Festnetz 2 kommunizieren, ohne Umweg über das Mobilkommunikationsnetz .According to the invention, the base station 1 of the cordless system is now compatible with the mobile communication system, i.e. in the standby mode, the base station 1 of the cordless system periodically sends out a specific identifier to indicate its presence and readiness for operation. The mobile terminal 3 listens to the frequency band according to the specific identifier of the base station 1. If the mobile terminal 3 comes into the coverage area of the base station 1 and receives its identification without interference, the mobile terminal 3 will try to log into the base station 1 in the manner described. For this purpose, as with the GSM system, authentication and initialization messages are exchanged between base station 1 and mobile terminal 3. If the authentication was successful, the mobile terminal 3 can communicate via the fixed network 2, without going through the mobile communication network.
Natürlich ist es auch möglich daß mehrere berechtigte Mobilendgeräte 3 ohne Mitwirkung eines öffentlichen Festnetzes 2, 9 oder des Mobilkommunikationsnetzes über dieOf course, it is also possible that several authorized mobile terminals 3 without the participation of a public landline network 2, 9 or the mobile communication network via the
Basisstation 1 des Schnurlos-Kommunikationsnetzes miteinander verschlüsselt kommunizieren. Base station 1 of the cordless communication network communicates with one another in encrypted form.

Claims

Ansprüche Expectations
1. Verfahren zum Betrieb eines Schnurlos- KommunikationsSystems, das auf der Funkschnittstelle mit einem öffentlichen Mobilkommunikationssystem, welches mindestens eine Funktion zur Authentikation aufweist, im wesentlichen kompatibel ist, dadurch gekennzeichnet, daß die Basisstation des Schnurlos-Kommunikationssystems mit Einrichtungen zum Lesen und Schreiben von Informationen von/auf Identifikationsmodulen ausgerüstet ist und über eine geeignete Software verfügt, um in Verbindung mit den auf den Identifikationsmodulen abgelegten Daten die Funktionen eines Heimatregisters bzw. einer Berechtigungszentrale bereitzustellen, so daß berechtigte Mobilendgeräte, die sich im Versorgungsgebiet des Schnurlos-Kommunikationssystems befinden, sich bei der ihnen zugehörigen Basisstation authentisieren und einbuchen können.1. A method for operating a cordless communication system which is essentially compatible on the radio interface with a public mobile communication system which has at least one function for authentication, characterized in that the base station of the cordless communication system with devices for reading and writing information from / to identification modules and has suitable software to provide the functions of a home register or an authorization center in connection with the data stored on the identification modules, so that authorized mobile devices that are located in the coverage area of the cordless communication system are located at authenticate and log in to the associated base station.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß wesentliche Bereiche der Daten des in der Basisstation benutzten Identifikationsmoduls identisch mit den auf der Chipkarte (SIM) eines zugangsberechtigten Mobilendgerätes abgelegten Daten ist.2. The method according to claim 1, characterized in that essential areas of the data of the identification module used in the base station are identical to the data stored on the chip card (SIM) of an access-authorized mobile terminal.
3. Verfahren nach einem der Ansprüche 1 oder 2 , dadurch gekennzeichnet, daß vom Netzbetreiber des Mobilkommunikationssystems die Berechtigung des Mobilendgerätes zum Einbuchen bei der Basisstation des Schnurlos-Kommunikationssystems gesperrt werden kann. 3. The method according to any one of claims 1 or 2, characterized in that the authorization of the mobile terminal for logging into the base station of the cordless communication system can be blocked by the network operator of the mobile communication system.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß auf dem Identifikationsmodul neben individuellen Teilnehmerdaten zur Authentisierung weitere Daten, nämlich die erlaubten Frequenzen, die maximal zulässigen Ausgangsleistungen für die Basisstation und das Mobilendgerät, die zulässigen Dienste (Telefonie, Datenübertragung, Fax etc.) und alle anderen4. The method according to any one of claims 1 to 3, characterized in that on the identification module in addition to individual subscriber data for authentication further data, namely the permitted frequencies, the maximum permissible output powers for the base station and the mobile terminal, the permitted services (telephony, data transmission, Fax etc.) and everyone else
Initialisierungsparameter, auf die der Netzbetreiber Einfluss nehmen will und welche Rahmenvorgabe für den Betrieb derInitialization parameters on which the network operator wants to influence and which framework for the operation of the
Basisstation des Schnurlos-Systems sind, nicht manipulierbar abgelegt sind.Base station of the cordless system are stored, are not manipulable.
5. Verfahren nach einem der Ansprüche 1 bis 4 , dadurch gekennzeichnet, daß die Funkschnittstelle der Basisstation des Schnurlos-Kommunikationssystems im Frequenzspektrum eines öffentlichen Mobilkommunikationssystems arbeitet.5. The method according to any one of claims 1 to 4, characterized in that the radio interface of the base station of the cordless communication system operates in the frequency spectrum of a public mobile communication system.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß auf der Funkschnittstelle eine6. The method according to any one of claims 1 to 5, characterized in that on the radio interface
Verschlüsselung der übertragenen Daten angewendet wird.Encryption of the transmitted data is applied.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Basisstation einen Zeitgeber (Timer) beinhaltet, der vom Netzbetreiber auf eine bestimmte Zeit programmiert ist, und der bei rechtmäßiger Benutzung der Basisstation durch den Teilnehmer immer automatisch zurückgesetzt wird, wobei die Basisstation bei Nichtbenutzung, d.h. nach Ablauf der im Timer programmierten Zeitspanne die Berechtigung verliert, ihren Sender auf den7. The method according to any one of claims 1 to 6, characterized in that the base station includes a timer (timer) which is programmed by the network operator for a certain time, and which is always automatically reset by the subscriber when the base station is used lawfully, whereby the base station when not in use, ie after the time programmed in the timer has expired, the transmitter loses its authorization to the
Frequenzen des Mobilkommunikationssystems in Betrieb zu nehmen .To put frequencies of the mobile communication system into operation.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß bei automatischer Abschaltung der Basisstation durch Timerablauf die Möglichkeit einer Notwiederaufnahme des Betriebes vorgesehen ist.8. The method according to any one of claims 1 to 7, characterized in that when the automatic shutdown Base station through the timer expiration the possibility of an emergency resumption of operation is provided.
9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine Notwiederaufnahme des Betriebes der Basisstation nur innerhalb eines definierten Zeitfensters möglich ist.9. The method according to any one of claims 1 to 8, characterized in that an emergency resumption of operation of the base station is only possible within a defined time window.
10. Schnurlos-Kommunikationssystem zur Durchführung des Verfahrens gemäß den Ansprüchen 1 bis 9, dadurch gekennzeichnet, daß die Basisstation (1) des Schnurlos- Kommunikationssystems mit mindestens einem Lese-/Schreibgerät ausgerüstet ist, mit welchem Informationen üblicher Identifikationsmodule (7) eines öffentlichen Mobilkommunikationssystems gelesen und geschrieben werden können, und in der Basisstation (1) eine geeignete Software implementiert ist, welche Informationen von dem Identifikationsmodul (7) liest bzw. Informationen auf das Identifikationsmodul schreibt und diese verarbeitet.10. Cordless communication system for carrying out the method according to claims 1 to 9, characterized in that the base station (1) of the cordless communication system is equipped with at least one reader / writer with which information of conventional identification modules (7) of a public mobile communication system can be read and written, and a suitable software is implemented in the base station (1), which reads information from the identification module (7) or writes information to the identification module and processes it.
11. Schnurlos-Kommunikationssystem nach Anspruch 10, dadurch gekennzeichnet, daß als Identifikationsmodul (7) die in Mobilkommunikationssystemen üblicherweise benutzten Chipkarten (SIM), wie z.B. nach ISO ID-1, ID-000, DCS 1800, PCS 1900, verwendet werden. 11. Cordless communication system according to claim 10, characterized in that as an identification module (7) the chip cards (SIM) usually used in mobile communication systems, such as e.g. according to ISO ID-1, ID-000, DCS 1800, PCS 1900.
EP98913526A 1997-02-28 1998-02-26 Public mobile communication system compatible wireless communication system Expired - Lifetime EP0963674B1 (en)

Applications Claiming Priority (3)

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DE19708189A DE19708189C2 (en) 1997-02-28 1997-02-28 Cordless non-public communication system compatible with a public mobile communication system
DE19708189 1997-02-28
PCT/DE1998/000569 WO1998038826A2 (en) 1997-02-28 1998-02-26 Public mobile communication system compatible wireless communication system

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EP0963674A2 true EP0963674A2 (en) 1999-12-15
EP0963674B1 EP0963674B1 (en) 2004-04-14

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CN (1) CN1106133C (en)
AT (1) ATE264599T1 (en)
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DE19708189A1 (en) 1998-09-03
ATE264599T1 (en) 2004-04-15
DE19708189C2 (en) 2000-02-17
EP0963674B1 (en) 2004-04-14
HUP0000677A3 (en) 2002-02-28
CN1106133C (en) 2003-04-16
WO1998038826A3 (en) 1999-03-04
PL335480A1 (en) 2000-04-25
PL192616B1 (en) 2006-11-30
HUP0000677A2 (en) 2000-06-28
CN1249116A (en) 2000-03-29
CA2282331C (en) 2005-05-10
AU6820298A (en) 1998-09-18
CZ307499A3 (en) 2000-01-12
WO1998038826A2 (en) 1998-09-03
CA2282331A1 (en) 1998-09-03
ES2219881T3 (en) 2004-12-01
US7248886B1 (en) 2007-07-24

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